The ceremony was attended by US dignitaries and naval officials. Credit: US Navy.

The US Navy’s Portsmouth Naval Shipyard has held a ground-breaking ceremony to mark the start of work on the $1.7bn new multi-mission dry dock project.

The multi-mission dry dock will provide extended capacity to accommodate three Los Angeles or Virginia-class attack submarines for repair, maintenance, and upgradation at the same time.

Go deeper with GlobalData

Data Insights

The gold standard of business intelligence.

Find out more

Related Company Profiles

View all

The latest seven-year construction project will upgrade the dry dock, enabling Portsmouth naval yard to meet the US Navy’s requirements in the coming years.

The project is part of the Shipyard Infrastructure Optimization Program (SIOP).

SIOP is a joint effort between aval Sea Systems Command (NAVSEA), Naval Facilities Engineering Systems Command (NAVFAC), and Navy Installations Command (NIC) to modernise to modernise four public naval shipyards to support the combat readiness of the navy.

Repairing and modernising dry docks, restoring shipyard facilities, and replacing aging and deteriorating capital equipment are some of the works included in the SIOP programme.

How well do you really know your competitors?

Access the most comprehensive Company Profiles on the market, powered by GlobalData. Save hours of research. Gain competitive edge.

Company Profile – free sample

Thank you!

Your download email will arrive shortly

Not ready to buy yet? Download a free sample

We are confident about the unique quality of our Company Profiles. However, we want you to make the most beneficial decision for your business, so we offer a free sample that you can download by submitting the below form

By GlobalData
Visit our Privacy Policy for more information about our services, how we may use, process and share your personal data, including information of your rights in respect of your personal data and how you can unsubscribe from future marketing communications. Our services are intended for corporate subscribers and you warrant that the email address submitted is your corporate email address.

US Navy Secretary Carlos Del Toro said: “This is a significant investment by the American people, and because of this investment, they can sleep more securely, because they’ll know our attack fleet can rely on quick and available maintenance and repair.

“Today’s ground-breaking cements the future of Portsmouth Naval Shipyard and the future of our submarine force.”

According to the US Navy, the Dry Dock 1 area was first built during the World War II for submarine production.

In June 2018, NAVSEA established SIOP Program Office, PMS-555, to coordinate the plan to recapitalise the shipyards.

In April 2019, NAVSEA started work on the $21bn SIOP project to modernise four public naval shipyards.

The four US Navy public shipyards to receive the upgrades are Norfolk Naval Shipyard in Virginia, Portsmouth Naval Shipyard in Maine, Puget Sound Naval Shipyard and Intermediate Maintenance Facility in Washington, and Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility in Hawaii.